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Practice Test Unit 5 The Cell
Test Description: Use this game to help you prepare for your unit 5 test about cells.
Instructions: Answer all questions to get your test result.
1) Both plant and animal cells have the following organelles in common:
A
plasma membrane, nucleus, cytoplasm
B
central vacuole, plasma membrane, nucleus
C
plasma membrane, cell wall, nucleus
D
plasma membrane, nucleus, chloroplast
2) The chloroplast is the organelle in which
A
enzymes are modified, stored, and routed to other parts of the cell.
B
ATP for the entire cell is produced.
C
photosynthesis occurs.
D
protein synthesis occurs.
3) Prokaryotic cells lack _____________________ and are much _____________________ than eukaryotic cells.
A
DNA; smaller
B
a membrane-enclosed nucleus; smaller
C
a membrane-enclosed nucleus; larger
D
a cell wall; smaller
4) The plasma membrane consists of two layers of phospholipids. This bilayer is composed of
A
DNA and phosphates.
B
phosphates on one end and proteins on the other end.
C
enzymes, carbohydrates, and lipids.
D
hydrophilic heads and hydrophobic tails.
5) Many of the specific functions of plasma membranes are carried out by ____________________ that are embedded in the phospholipid bilayer.
A
cellulose
B
lipids
C
hydrogen and phosphates
D
proteins
6) In the plasma membrane, “transport proteins” help cells
A
communicate and recognize each other.
B
carry out mechanical work such as muscle contraction.
C
move certain substances across the membrane.
D
synthesize more proteins for cellular movement.
7) Diffusion is most accurately defined as _____________________.
A
the active transport of materials across a cell membrane.
B
the facilitated movement of molecules across a permeable membrane.
C
molecules moving randomly in various directions.
D
the net movement of particles from where they are more concentrated to where they are less concentrated.
8) Passive transport means that
A
some particles enter the cell while others do not.
B
oxygen and carbon dioxide diffuse through the plasma membrane in the presence of phosphates.
C
proteins selectively allow certain small molecules out of the cell.
D
no energy is expended by the cell as particles move in and out of the cell.
9) Small polar molecules diffuse into and out of the cell through a process called
A
exocytosis
B
endocytosis
C
active transport.
D
facilitated diffusion
10) The passive transport of water across a selectively permeable membrane is called
A
equilibrium
B
hypotonic transport.
C
hypertonic transport.
D
osmosis
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